C、D、A、B不知道可对¿ qÇ\ ibbs.3c3t.comøA´ÒåP
C(2500/100+500/50=35 加可能的加密=35+1)¿ qÇ\ ibbs.3c3t.comøA´ÒåP
D(3000/100=30 加可能的加密=30+1)¿ qÇ\ ibbs.3c3t.comøA´ÒåP
A(用折线法调整直线段)¿ qÇ\ ibbs.3c3t.comøA´ÒåP
B(2500/50+500/20=75 加可能的加密=75+1)¿ qÇ\ ibbs.3c3t.comøA´ÒåP